Marine-engine governor.



No. 713L060. Patented May 27, I902.

J. LEVEY &. T. SADLER. MARINE ENGINE GOVERNOR.

(Application filed Apr. 17, 1901.) (No Model.)

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-MW W W & .z g 7 UNTTEE STATEs PATENT OFFICE.

JOHN LEVEY AND THOMAS SADLER, OF LINDSAY, CANADA.

MARINE-ENGINEGOVERNOR.

SPECIFICATION torming part of Letters Patent No. 701,060, dated May 27, 1902.

Application filed April 17, 1901.

To a, w/tom it may concern: 7

Be it known that we, JOHN LEVEY and THOMAS SADLER, of the town of Lindsay, in the county of Victoria, Province of Ontario, Canada, have invented certain new and useful Improvements in Marine-Engine Governors, of which the following is a specification.

The object of our invention is to devise a governor for marine engines which will prevent the racing of the engine which takes place when the screw by the pitching of the vessel is either partly or wholly lifted out of the water; and it consists, essentially, of a valve adapted to control the steam-supply to the engine, a pendulum adapted. to swing relative to the keel of the vessel in a fore-andaft plane, and means whereby the relative motion of the pendulum and keel when the vessel pitches and throws the screw to the surface will operate the controlling-valve and Wholly or partially shut off the steam from the engine, substantially as hereinafter more specifically described and then definitely claimed.

The drawing is a sectional elevation of our governor.

A is a valve-chest provided with the usual steam passages and ports. Within the valvechest are located the slide-valves B and C. By the motion of either of these valves the ports CL may be opened or closed. Hence the valve 0 will be referred to in the claims as the valve controlling the steam-supply.

D is the valve-rod of the valve B, passing upwardly through the hollow valve-rod E of the slide-valve O. The hollow valve-rod E passes through a suitable stuffing-box in the end of the valve-chest and is secured to the lower end of the frame F. A suitable stuffingbox is provided to pack the end of the hollow valve-stem E where the valve-stem D passes out through it. The frame F carries frictionrollers b, which are adapted to engage the end of the lever G, which is forked to permit of its embracing the valve-rod D. As the drawing is a section, only two of the friction-rollers Z) are seen; but it will be understood that the other half of the frame is provided with similar rollers to engage the other half of the forked end of the lever G. This lever is journaled on the stud c on the frame of the governor. Preferably on the same stud is jour- Serial No.756,192. (N0 model.)

naled the pendulum H, preferably provided with the adjustable Weight (1. A connection is formed between the lever G and the pendulum H by means of the bolts I, which pass through slots (2 in the lever G and are screwed into the pendulum II. When these bolts are tightened u p, a rigid connection is formed between the lever and the pendulum, but owing to the slots e the relative position of the two may be adjusted when desired.

The arm J extends outwardly from the lever G at the opposite side of the stud c from the forked end of the lever. A counterbalancing-weightfis adjustably secured on this arm and serves to balance the weight of the lever G and the slide-valve G. if

The lower end of the pendulum H is preferably slotted to embrace the radius-bar K, as shown, and friction-rollers g are pivoted in the end of the pendulum, one on each side of the radius-bar, to reduce the friction. The

roller on the near side is the only one visible in the drawing. On the radius-bar we place the stops L, which are slidable thereon and adjustable by set-screws, as shown. Each stop is preferably provided with a rubber buffer h.

As previously described, the valve-rod D extends up through the frame F and is connected with the centrifugal governor M,whicl1 is of ordinary construction and is operated by bevel-gearing in the ordinary manner. On the top of the valve-rod D, we place the adjusting-nuts P, which serve to limit the downward motion of the valve B.

Below the lower collar of the centrifugal governor is located the grooved spool N, which is engaged byv the end of the counterbalancing-lever O, pivoted on the frame of the ma.- chine and provided with the adjustable weight Q. This weight may be adjusted to balance the weight of the valve B and its con nected parts.

Under ordinary circumstances the centrifugal governor M will take care of all varia tions in speed caused by variations in the work being done by the engine. An ordinary governor, however, does not begin to act until the engine has increased its speed. When a vessel plunges and lifts her screw partly or wholly out of water, racing at once commences, and the ordinary governor produces be in.

no effect until the racing has continued for a sufticient length of time to effect material injury and the waste of a considerable amount of the energy developed by the engine. With our special governor as soon as the vessel plunges and lifts her stern the inertia of the pendulum causes it to swing outwardly on the radius-bar, thus depressing the valve 0 through its connections with the lever G. The steam may be thus wholly or partly cut oif as soon as the screw lifts out of water suf ficiently to become dangerous. As it is not desirable that the steam should be reduced in quantity or cut off when ordinary pitching alone takes place,we adjust the sternward stop L forward on the radius-bar a sufficient number of degrees to allow for ordinary pitching. This naturally depresses the valve 0 and partly closes the port a. To compensate for this, the bolts I may be loosened and the position of the lever G altered to raise the valve clear of the ports. The lever may then be clamped-in its new position by retightening the bolts. \Vhen this has been done,non1ovement of the pendulum takes place until the pitch of the vessel exceeds the minimum arranged for by the adjustment of the stern- .ward stop L. As vessels are not always trimmed on an even keel, the adjustments described permit of'the governor being corrected to suit whatever trim the vessel may The outer stop L serves to limit the the ports a.

gree of cut-off can be adjusted to suit any condition. The weight on the pendulum is preferably adjustable, as shown, so that its inertia may be regulated as desired to suit the amount of friction in the moving parts that has to be overcome. When we speak of the pendulum swinging, it is of course merely relatively to the other parts, as they actually do the swinging, and the pendulum, owing to the inertia of its weight, always tends to hang with its center of gravity vertically below its point of support.

The apparatus is of course set up with the radius-bar pointing toward the bow of the vessel. I

What We claim as our invention is-- In a device of the class described, the combination of a valve-chest provided with asuitable port or ports; two valves sliding therein and each adapted to open and close the said ports; a hollow valve-rod secured to one valve;

a valve-rod secured to the other and extending through the hollow valve-rod; an ordinary centrifugal governor connected with one valve-rod; a pendulum adapted to swing relative to the keel of the vessel in a fore-and-aft plane; and means whereby the relative motion of the pendulum and keel when the vessel pitches will operate the last-mentioned valve-rod, substantially as described.

Lindsay, March 30, 1901.

JOHN LEVEY. THOMAS SADLER. In presence of- ALEX. JACKSON, NIVEN M. JACKSON. 

